html,
body {
    margin: 0;
    padding: 0;
    overflow: hidden;
}
body {
    display: flex;
    flex-wrap: nowrap;
}
a {
    text-decoration: none;
    color: #222226;
}
.nav-left-box {
    min-width: 10%;
    min-height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    background: url('https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fpic.51yuansu.com%2Fpic3%2Fcover%2F03%2F00%2F56%2F5ad6ab1327b45_610.jpg&refer=http%3A%2F%2Fpic.51yuansu.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1638880743&t=a2ec4c8c7d7dbca7102fdaac698d24bf') no-repeat;
    background-size: 100% 100%;
}
.nav-left-item {
    width: 100%;
    min-height: 60px;
    line-height: 60px;
    box-sizing: border-box;
    text-align: center;
    margin-top: 10px;
    margin-bottom: 10px;
    box-shadow: -3px 1px 5px red;
}
.logo {
    width: 80px;
    height: 70px;
    margin: 10px 0;
}
.nav-left-item a {
    display: block;
    width: 100%;
    height: 100%;
    box-sizing: border-box;
    padding: 0 5px;
}
.nav-left-item a:hover {
    color: white;
    box-shadow: -3px 1px 5px #C00000;
}
.right-container {
    width: 90%;
    min-height: 100vh;
    overflow-x: hidden;
}

.right-container iframe {
    width: 100%!important;
    height: 100%!important;
    overflow: hidden;

}
